🔹It is also called as called ‘sandwich radiography’. Occlusal radiographs are made using an extreme bisecting angle technique in which the primary beam is directed perpendicular to the imaginary bisector of angle formed between long axis of the tooth and long axis of the film.
🔹Mandibular cross-sectional view: Also known as ‘mandibular true occlusal radiograph’. The film packet is placed in mouth in such a way that its short axis is in line with the median plane. The central ray is directed along the median plane so as to be perpendicular to the film packet.
🔹Mandibular anterior topographic view: The film packet is placed between the teeth in such a way that the pebbled surface is towards the mandibular teeth. The tube is adjusted to direct the central rays through the tip of the chin in the midline at a −55° angle to the plane of the film packet.
🔹Mandibular lateral topographic view: The long axis of the film is parallel to the facial surfaces of posterior teeth and the film is placed as posteriorly as possible. The head is positioned so that the occlusal plane of the mandibular teeth is perpendicular to the horizontal plane and the median plane is vertical.
🔹Pediatric mandibular occlusal view: A size 2 film is used for projection with an embossed dot towards mandibular teeth and the short axis of the film is parallel to the median plane. The central ray is directed through the child’s chin at −55°.
Enter your email address to receive our Free Newsletter for key Exam and Resource Updates